Bring lightly salted water to a boil in a large pot, throw the pasta in for eight minutes to achieve al dente status, drain pasta in a strainer in the sink, pour in a couple of tablespoons of extra-virgin olive oil in the now-empty pot, throw in your pre-cut sliced mushrooms, minced onions, and peppers and sautée for a few minutes, pour in tomato sauce and mix. Then slowly mix in the fully drained pasta and stir in additional pasta sauce over minimum heat. Stir, stir, stir, and if you have spices / garnishes, now would be the time. Stir again, and now scoop onto plates. Top off with parsley, or parmesan, or whatever you like, and enjoy.